North American XB-70A Valkyrie Published on September 21, 2012 in 21 September 1964Full resolution (1392 × 1084) Next → North American Aviation XB70A-1-NA 62-001 takes off for the first time, 21 September 1964. (U.S. Air Force) North American XB-70A Valkyrie first Flight, Sept. 21, 1964. (U.S. Air Force photo)